All the examples that I see in the Janus documentation seem to use Groovy. Instructions such as JanusGraphFactory.open(), graph.openManagement(), mgmt.makeEdgeLabel() etc.
Is there any human-friendly plaintext format that I can use to write my graph with, and then load into Janus? In practical terms what I would like to do is this:

1. write my graph in a text file, all nodes and edges, and the schema too. So the format should be human-friendly and easy to edit manually. Hopefully not XML.
2. load this graph into Janus by asking Janus to read my graph file. Not in-memory though, I mean to create a new persistent database that is always there when Janus starts.